At this point, the gas welding rod copper coated steel is dipped into the puddle. Fundamentals of gas cutting and welding ced engineering. This process involves mixing oxygen with acetylene which produces a flame that burns very hot. Welding skills, processes and practices for entrylevel welders chapter 3 fluxcored welding1 pdf cengage learning. An oxyacetylene outfit is portable, less expensive and more versatile than a.
The flame heats the base metal to its fluid or puddle state. Use a welding rod on on a piece of thin aluminum sheet metal. Oxy acetylene welding was developed and used from the mid to late 1800s. Temperatures from the combustion of oxygen o2 gas and ethyne, or acetylene c2h2 gas can reach 3,340 degrees celsius, which is hot enough to cut through steel. Oxygenacetylene welding, or gas welding, is a process which relies on. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting, and hard facing.
The torch for oxyacetylene welding is a precisionmade tool, usually constructed with a forged brass body, two knobs controlling the gas flow, and copper tips of varying size see illustration. The oxyacetylene handbook is a basic handbook or manual on oxyacetylene welding and cutting and their related processes. Turn off acetylene torch valve you will have purged the acetylene line at the same. Oxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. Gas welding is accomplished by heating the ends or edges of metal parts to a molten state with a high temperature flame. Interpass heatingapplication of heat to a base metal during a welding process. Lighting, adjusting and shutting down an oxygenacetylene torch is easy especially when following the proper procedures. It is the getting ready to weld that takes the time.
Air products welders handbook fusion welding the most widely used welding processes rely on fusion of the components at the joint line. Two of these techniques are used to weld flat joints and one is used for allposition welding. As the electrode movement is manually controlled hence it is termed as manual metal arc welding. It is an invaluable aid to industry as well as in schools and universities. The 100 page, well illustrated text discusses safety concerns, torches, metals, the operation of welding equipment, and the various techniques used to weld, braze, cut and solder steel, bronze, silver, and cast iron. Even 18 inch stock should be welded from both sides for penetration and strength. In order to comfortably and safely see the flame when welding or cutting, welding goggles must be worn. Pdf oxyfuel welding and cutting sewalem gezie academia. Describe the three types of flames and their effects on the metal to be welded.
Oxyacetylene welding manual here some of the sections which had been blown or struck out of the cast cylinders, etc. Tig tutorial with current calculator hints and tips. Gap wirea wire used for correct spacing of butt joints. Oxy acetylene welding ofw fundamentals pressure settings. Describe the proper sequence of steps in preparing the oxyacetylene system for lighting the welding torch. You want to match the type of aluminum you are welding to the rod type.
Gas flame the molten metal must be protected from the atmosphere absorption of. Oxyacetylene is quite common in automotive repair shops, as well as plumbing applications, fabricating, and even artisan welding. The high temperature flame melts the metal faces of the workpieces to be joined, causing them to flow together. Fundamentals of welding 1 introduction the term joining is generally used for welding, brazing, soldering, and adhesive bonding, which form a permanent joint between the partsa joint that cannot easily be separated. Gas weldingoxy acetylene,equipment details,types of flames,applications gas welding process pdf. You can probably get away with welding pieces of 18 inch steel together without making a chamfer on the edges to be joined as you see in the graphic. The oxyacetylene torch is a safe tool if used properly. Oxy fuel or oxy acetylene welding are gas welding procedures that were invented in the early 1900s. The oxyacetylene torch can be used for various tasks. A mixture of oxygen and acetylene, burns as an intense focussed flame, at approximately 3,500 degrees centigrade. Why does the flame appear to have a bright blue inner cone and a lighter blue outer feather of a flame. The two gasses are controlled by separate knobs, and are mixed inside the torch body.
The oxyacetylene flame produces an intense bright light that causes discomfort and possible injury to the eyes. It can be used for cutting steel, welding steel, brazing and for heating metal. It uses extreme heat to function, and setting it up properly is one of the most important steps in using it safely. Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. Oxy acetylene welding uses high pressure gas cylinders that contain the two gases oxygen and acetylene. An introduction to gas welding oxyacetylene youtube. As mentioned in the previous chapter, gas welding, using oxygen and hydrogen, dates back to the 1850s. With the addition of oxygen a flame temperature in excess of 6000 deg. How to operate an oxyacetylene cutting torch snapguide. It is a welding process that melts and joins the metals by heating them with a flame caused by a reaction of fuel gas and oxygen. The harris product group 23a901 oxyacetylene weld tip the harris product group 23a901 oxyacetylene weld tip is fully swaged for a smooth bore, long cone and positive flame control. By varying the relative amounts of acetylene and oxygen, a welder can produce different flame atmospheres and temperatures as he requires. Gas welding and cutting oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame.
When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Oxy fuel welding includes any welding operation that makes use of a fuel gas combined with oxygen as a heating medium. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene. In fusion welding, a heat source melts the metal to form a bridge between the components. For example, if you are welding 3003 or 1100 aluminum you will want to use an 1100. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. Welding part 1 oxyacetylene welding oxyacetylene welding we use oxyacetylene for brazing in the collision repair industry, but, it is not really used for cutting much in the automotive industry, as it create too much heat and can warp or ruin todays metals. This document contains general information about the topic discussed herein.
Safety for oxyacetylene welding thompson rivers university. Screw in acetylene regulator thandle adjusting valve to working pressure for. The gases are able to be mixed and used for welding through the use of. Harris 23a903 oxyacetylene weld tip1600870 the home depot. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the united states and oxyfuel cutting are processes that use fuel gases or liquid fuels such as gasoline and oxygen to weld or cut metals. Hydrogen may be used in place of acetylene for aluminum welding, but. There are three main techniques used in oxyfuel welding.
Using the oxyacetylene weld tip is the best way to join dissimilar metals, or repair cast iron. The oxyacetylene welding process uses a combination of oxygen and acetylene gas to provide a high temperature flame. While welding, the pipes are rotated constantly so as to weld the seam in the horizontal position only. How to set up an oxy acetylene torch with pictures wikihow. This welding on the web box will appear throughout the manual. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene.
Open the valve on the acetylene cylinder no more than threefourths of a turn so it can be closed quickly in case of emergency. However, it is still widely used for a variety of applications. Oxyacetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major welding gases. Heating tip uses a tremendous amount of oxygenacetylene. Pure oxygen, instead of air, is used to increase the. Every effort has been extended in the preparation of this book to make it a textbook on the manual application of the oxyacetylene processes that. Gas welding is also named as oxyfuel gas welding ofw. This document is not an application manual and does not contain a complete statement of all factors pertaining to that topic. When the required temperature is reached, the cutting oxygen is turned on, and the stream of pure oxygen is directed against the heated metal. This is a special welding technique used for butt welding of steel pipes.
Fundamentals of gas cutting and welding cedengineering. The harris products group is a world leader in metal working products used in the brazing, soldering, welding, cutting and. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal. Oxy acetylene welding equip setup free download as powerpoint presentation. Welding beginners guide to oxyacetylene equipment b. Relevant sketches are given wherever required to make the subject interesting. An introduction to gas welding oxyacetylene this is a video by the world association of technology teachers. The same type of oxyfuel welding apparatus is used in all cases, but the torch welding tip size could be changed depending on the amount of btu heat output.
A friend brought me a bicycle rack for the bumper and trunk lid of. And this welding process is still very popular today, mainly because it does not require much equipment, and does not require power. In oxyfuel welding, a welding torch is used to weld met als. The oxyacetylene process is quite versatile, and can be used to weld most metals, it can be used as a cutting torch, as a brazing torch, and. This specification prescribes requirements for the classification of bare magnesium all welding electrodes and rods for use with the gas metal arc, gas tungsten arc, oxyfuel gas, a. Oxyfuel welding ofw is a group of welding processes that join metals by heating them with a fuel gas flame or flares with or without the application of pressure and with or without the use of filler metal. In oxyfuel cutting, the metal is first preheated with the oxy fuel flame to the ignition temperature.
Video an introduction to gas welding oxyacetylene oxyacetylene gas welding is commonly used to permanently join mild steel. Acetylene, when burned alone, can produce a flame temperature of about 4000 deg. Welding part 1 oxyacetylene welding collision blast. An oxy acetylene torch is an affordable and versatile tool used by many people to heat, weld, solder, and cut metal. Oxyacetylene welding also known as oxyacetylene welding uses an oxyfuel gas flame can be applied with or without pressure can be applied with or without the use of filler materials 5. It is the only gas mixture hot enough to melt steel. If you dont know the first thing about welding, but want to learn, this is the book for you. Oxy acetylene welding equip setup gases industrial. A stepbystep guide welding is a delicate art, but once you learn it, ordinary steel becomes a blank canvas for invention. Oxyfuel oxyacetylene welding a guide to gas welding. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy.
An oxyacetylene outfit is portable, less expensive and more versatile than a electric welding set up. It is clarified that this handbook does not supersede any existing instructions. How to properly light, adjust and shut down an oxyacetylene torch harris products group. Oxy acetylene welding is a welding process manually, in which the surfaces to be joined, which is warming to melt by a gas flame oxyacetylene with or without filler metal, where the connection process without emphasis. Then weld some other aluminum bits and parts you have lying around. First close the acetylene knob all the way until the flame is extinguished.